Originally Posted by
Bruce Wayne
if the MET office can provide ash density figures with an accuracy of +/-30% from 6km to 500m over specific airways and and specific levels, why has that not been done and the information disseminated to NATS in order that ASHTAM's can be issued and airways and flight levels opened to IFR traffic?
What are the density figures which it's safe to fly through? I can tell you the answer, none are defined. The rules are no flying through ash contaminated airspace, very woolly but with no possibility of misinterpretation. Hence the call for some standards to be defined, cause we have none.
BD